QUESTION 6Can we attach an EBS volume to more than one EC2 instance at the same time?

A. NoB. Yes.C. Only EC2-optimized EBS volumes.D. Only in read mode.

Answer: A

QUESTION 7True or False: Automated backups are enabled by default for a new DB Instance.

A. TRUEB. FALSE

Answer: A

QUESTION 8What does the AWS Storage Gateway provide?

A. It allows to integrate on-premises IT environments with Cloud Storage.B. A direct encrypted connection to Amazon S3.C. It’s a backup solution that provides an on-premises Cloud storage.D. It provides an encrypted SSL endpoint for backups in the Cloud.

Answer: A

QUESTION 9Amazon RDS automated backups and DB Snapshots are currently supported for only the ____ storage engine.

A. InnoDBB. MyISAM

Answer: A

QUESTION 10How many relational database engines does RDS currently support?

QUESTION 13Typically, you want your application to check whether a request generated an error before you spend any time processing results. The easiest way to find out if an error occurred is to look for an ____ node in the response from the Amazon RDS API.

A. A security group in which only tasks inside can communicate with each otherB. A special type of workerC. A collection of related WorkflowsD. The DNS record for the Amazon SWF service

Answer: CExplanation:Domains provide a way of scoping Amazon SWF resources within your AWS account. All the components of a workflow, such as the workflow type and activity types, must be specified to be in a domain. It is possible to have more than one workflow in a domain; however, workflows in different domains cannot interact with each other.http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-domain.html

QUESTION 16EBS Snapshots occur ____.

A. AsynchronouslyB. SynchronouslyC. Weekly

Answer: AExplanation:Snapshots occur asynchronously; the point-in-time snapshot is created immediately, but the status of the snapshot is pending until the snapshot is complete (when all of the modified blocks have been transferred to Amazon S3), which can take several hours for large initial snapshots or subsequent snapshots where many blocks have changed.http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-creating-snapshot.html

QUESTION 18Out of the stripping options available for the EBS volumes, which one has the following disadvantage: ‘Doubles the amount of I/O required from the instance to EBS compared to RAID 0, because you’re mirroring all writes to a pair of volumes, limiting how much you can stripe.’?

A. Raid 0B. RAID 1+0 (RAID 10)C. Raid 1D. Raid

Answer: CExplanation:http://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/raid-config.htmlraid 0 and 1 are the common types. Raid 5 and 6 are not recommended because of the extended stripe. If you encounter this question on the exam I suspect the answer options will be different.Raid 1 DisadvantageDoes not provide a write performance improvement; requires more Amazon EC2 to Amazon EBS bandwidth than non-RAID configurations because the data is written to multiple volumes simultaneously.Raid 0 DisadvantagePerformance of the stripe is limited to the worst performing volume in the set. Loss of a single volume results in a complete data loss for the array.Raid 5 and 6 notesRAID 5 and RAID 6 are not recommended for Amazon EBS because the parity write operations of these RAID modes consume some of the IOPS available to your volumes. Depending on the configuration of your RAID array, these RAID modes provide 20-30% fewer usable IOPS than a RAID 0 configuration. Increased cost is a factor with these RAID modes as well; when using identical volume sizes and speeds, a 2-volume RAID 0 array can outperform a 4-volume RAID 6 array that costs twice as much.

A. Only in certain regionsB. Only with MSSQL based RDSC. Only for Oracle RDS typesD. No

Answer: BExplanation:https://aws.amazon.com/rds/faqs/Q: Can I create a Read Replica of another Read Replica?Amazon RDS for MySQL: You can create a second-tier Read Replica from an existing first-tier Read Replica. By creating a second-tier Read Replica, you may be able to move some of the replication load from the master database instance to a first-tier Read Replica. Please note that a second-tier Read Replica may lag further behind the master because of additional replication latency introduced as transactions are replicated from the master to the first tier replica and then to the second-tier replica.Amazon RDS for PostgreSQL: Read Replicas of Read Replicas are not currently supported.

QUESTION 20Can Amazon S3 uploads resume on failure or do they need to restart?

A. Restart from beginningB. You can resume them, if you flag the “resume on failure” option before uploading.C. Resume on failureD. Depends on the file size